Laptop not connecting to Wifi

Hello,

I have DELL STUDIO 1555 Laptop. Whenever i am trying to get it connected to Wifi or any Hot Spot, it showing error. I tried after updating the the drivers as well but still its showing "Windows was not able to connect". I have also disabled the Windows Firewall but still its the same error i am getting.

Please help me with this issue.

Thanks & Regards,
Pankaj